Chirality and magnetism II: Free electron on an infinite helix, inverse Faraday effect and inverse magnetochiral effect

► The free electron on a quasi-infinite helix demonstrates the basic selection rules governing the magneto-optical properties of a chiral molecular system. ► Here we explore from this point of view the non-linear optical inverse Faraday effect and the inverse magnetochiral effect. ► It is shown that in these cases definite selection rules also depend on the long-wavelength approximation.